Added CRUD but edit and delete giving errors.

models/assistant.rb

@@ -11,6 +11,7 @@ class Assistant < Sequel::Model
   def validate
     super
     errors.add(:name, 'must be present') if name.nil? || name.empty?
+    errors.add(:run_command, 'must be present') if run_command.nil? || run_command.empty?
   end
 
   # Optional: Add custom methods for common operations
@@ -18,7 +19,16 @@ class Assistant < Sequel::Model
     where(name: name).first
   end
 
+  def self.find_by_run_command(run_command)
+    where(run_command: run_command).first
+  end
+
   def self.active
     where(active: true)
   end
+
+  # Helper to check if this is a new record
+  def new?
+    id.nil?
+  end
 end